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ASP 中的 UTF-8编码

出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2009-09-13 浏览: 202 ::

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关于静态页生成问题突破form数量限制 utf-8编码转换成gb2312

参考文档：http://www.linuxforum.net/books/UTF-8-Unicode.html
代码如下：
＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝＝

复制代码代码如下:

<script language="VBScript"> 
'http://www.linuxforum.net/books/UTF-8-Unicode.html 
Public Function UTF8EncodeChar(z) 
Dim c : c=AscW(z)'取UNICODE编码 
if c>0 And c<256 Then'Asc编码直接返回 
UTF8EncodeChar=z 
Exit Function 
End If 
If c<0 Then c=c + &H10000&'VBScript的Integer溢出，加上 
Dim k : k=CLng(c)'备份一个编码，后面判断要用 
Dim b() 
Dim i : i=0 
While c>&H0&'将编码按照6位一组，分组存到字节数组 b 中 
ReDim Preserve b(i) 
b(i)=CByte(c And &H3F&) 
c=c \ &H40& 
i=i+1 
Wend 
If UBound(b)>0 Then '如果分开的6位组不止一个，除最高一组外，全部加上二进制10000000 
For i=0 To UBound(b)-1 
b(i)=b(i) + &H80 
Next 
End If 
i=UBound(b)'根据字符的UNICODE编码范围，给最高组加上前缀 
If k<=CLng(&H7F&) Then 
b(i) = b(i) + 0 
ElseIf k<=CLng(&H7FF&) Then 
b(i) = b(i) + &HC0 
ElseIf k<=Clng(&HFFFF&) Then 
b(i) = b(i) + &HE0 
ElseIf k<=CLng(&H1FFFFF&) Then 
b(i) = b(i) + &HF0 
ElseIf k<=CLng(&H3FFFFFF&) Then 
b(i) = b(i) + &HF8 
Else 
b(i) = b(i) + &HFC 
End If 
UTF8EncodeChar="" 
For i=UBound(b) To 0 Step -1'将分组转换成URL编码 
UTF8EncodeChar=UTF8EncodeChar & "%" & Right("00" & Hex(b(i)),2) 
Next 
Erase b 
End Function 
Public Function UTF8EncodeString(s) 
Dim i,l,c : l=Len(s) 
For i=1 To l 
UTF8EncodeString=UTF8EncodeString & UTF8EncodeChar(Mid(s,i,1)) 
Next 
End Function 
MsgBox UTF8EncodeString("圪圪 eglic ") 
</script>

测试方法：
http://www.google.com/search?hl=zh-CN&newwindow=1&rls=GGLG%2CGGLG%3A2006-15%2CGGLG%3Azh-CN&q=你的编码

复制代码代码如下:

function revertUTF8(szInput) 
{ 
var x,wch,wch1,wch2,uch="",szRet=""; 
for (x=0; x<szInput.length; x++) 
{ 
if (szInput.charAt(x)=="%") 
{ 
wch =parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
if (!wch) {break;} 
if (!(wch & 0x80)) 
{ 
wch = wch; 
} 
else if (!(wch & 0x20)) 
{ 
x++; 
wch1 = parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
wch = (wch & 0x1F)<< 6; 
wch1 = wch1 & 0x3F; 
wch = wch + wch1; 
} 
else 
{ 
x++; 
wch1 = parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
x++; 
wch2 = parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
wch = (wch & 0x0F)<< 12; 
wch1 = (wch1 & 0x3F)<< 6; 
wch2 = (wch2 & 0x3F); 
wch = wch + wch1 + wch2; 
} 
szRet += String.fromCharCode(wch); 
} 
else 
{ 
szRet += szInput.charAt(x); 
} 
} 
return(szRet); 
} 

function u2utf8($c) 
{ 
/*for($i=0;$i<count($c);$i++)*/ 
$str=""; 
if ($c < 0x80) { 
$str.=$c; 
} 
else if ($c < 0x800) { 
$str.=chr(0xC0 | $c>>6); 
$str.=chr(0x80 | $c & 0x3F); 
} 
else if ($c < 0x10000) { 
$str.=chr(0xE0 | $c>>12); 
$str.=chr(0x80 | $c>>6 & 0x3F); 
$str.=chr(0x80 | $c & 0x3F); 
} 
else if ($c < 0x200000) { 
$str.=chr(0xF0 | $c>>18); 
$str.=chr(0x80 | $c>>12 & 0x3F); 
$str.=chr(0x80 | $c>>6 & 0x3F); 
$str.=chr(0x80 | $c & 0x3F); 
} 
return $str; 
}

复制代码代码如下:

'UTF8 URLEncode 
Public Function URLEncodeUTF8(ByVal s) 
Dim i, k 
Dim sl 
Dim c 
Dim uni 
Dim tp, h1, h2, h3 
sl = Len(s) 
tp = "" 
k = 0 
For i = 1 To sl 
c = Mid(s, i, 1) 
uni = AscW(c) 
If uni < 0 Then uni = uni + 65536 
If uni < 128 Then 
tp = tp & Chr(c) 
k = k + 1 
ElseIf uni < 2048 Then 
k = k + 2 
h2 = "%" & Hex(&H80 XOr (uni And &H3F)) 
uni = uni \ (2^6) 
h1 = "%" & Hex(&HC0 XOr (uni And &H1F)) 
tp = tp & h1 & h2 
Else 
h3 = "%" & Hex(&H80 XOr (uni And &H3F)) 
uni = uni \ (2^6) 
h2 = "%" & Hex(&H80 XOr (uni And &H3F)) 
uni = uni \ (2^6) 
h1 = "%" & Hex(&HE0 XOr (uni And &H0F)) 
tp = tp & h1 & h2 & h3 
End If 
Next 
URLEncodeUTF8 = tp 
End Function 
'A-Fa-f0-9 Byte 
Public Function isxdigit(c) 
isxdigit = CBool((c>=48 And c<=57) Or (c>=65 And c<=70) Or (c>=97 And c<=102)) 
End Function 
Public Function isascii(c) 
isascii = CBool(c>0 And c<128) 
End Function 
'判断是否是UTF8字节 
Public Function IsUTF8Body(ByVal u) 
IsUTF8Body = CBool(u>=&H80 And u<=&HBF) 
End Function 
'判断有几个UTF8字节 
Private Function UTF8Byte(ByVal u) 
If u > &H00 And u <= &H7F Then 
UTF8Byte = 1 
ElseIf u >= &HC0 And u <= &HDF Then 
UTF8Byte = 2 
ElseIf u >= &HE0 And u <= &HEF Then 
UTF8Byte = 3 
ElseIf u >= &HF0 And u <= &HF7 Then 
UTF8Byte = 4 
ElseIf u >= &HF8 And u <= &HFB Then 
UTF8Byte = 5 
ElseIf u >= &HFC And u <= &HFD Then 
UTF8Byte = 6 
Else 
UTF8Byte = 0 
End If 
End Function 
'判断三个连续字节是不是UTF8字符 
Private Function UTF8Test(ByVal u1, ByVal u2, ByVal u3) 
UTF8Test = False 
If CBool(u1>=&HC0 And u1<=&HFD) Then 
UTF8Test = CBool(IsUTF8Body(u2) And IsUTF8Body(u3)) 
End If 
End Function 
Private Function ishex(s) 
ishex = False 
If Len(s)<2 Then Exit Function 
If isxdigit(Asc(Mid(s, 1, 1)))=False Then Exit Function 
If isxdigit(Asc(Mid(s, 2, 1)))=False Then Exit Function 
ishex = True 
End Function 
Private Function isescape(s) 
isescape = False 
If Len(s)<5 Then Exit Function 
If UCase(Mid(s, 1, 1)) <> "U" Then Exit Function 
If isxdigit(Asc(Mid(s, 2, 1)))=False Then Exit Function 
If isxdigit(Asc(Mid(s, 3, 1)))=False Then Exit Function 
If isxdigit(Asc(Mid(s, 4, 1)))=False Then Exit Function 
If isxdigit(Asc(Mid(s, 5, 1)))=False Then Exit Function 
isescape = True 
End Function 
Private Function AscX(s) 
AscX = CInt("&H" & Mid(s, 1, 2)) 
End Function 
'URLDecode 完全版 
'支持Server.URLEncode，UTF8 URLEncode，Escape 加密的字符串 
Public Function URLDecode(s) 
Dim tp 
Dim i 
Dim tl 
Dim pp 
Dim a, b, c 
Dim h 
URLDecode = "" 
tp = Split(Replace(s, "+", " "), "%") 
tl = UBound(tp) 
If tl = -1 Then Exit Function 
pp = tp(0) 
For i = 1 To tl 
If isescape(tp(i)) Then 
pp = pp & ChrW("&H" & Mid(tp(i), 2, 4)) & Mid(tp(i), 6) 
ElseIf ishex(tp(i))=False Then 
pp = pp & tp(i) 
Else 
a = AscX(tp(i)) 
If isascii(a)=False And Len(tp(i))=2 Then 
If (i+1)>tl Then Exit For 
b = AscX(tp(i+1)) 
If (i+2)>tl Then 
pp = pp & Chr(a*2^8 Or b) & Mid(tp(i+1), 3) 
i = i + 1 
Else 
c = AscX(tp(i+2)) 
If UTF8Byte(a)=3 And UTF8Test(a,b,c)=True Then 
h = (a And &H0F) * 2 ^12 Or (b And &H3F) * 2 ^ 6 Or (c And &H3F) 
If h<0 Then h = h + 65536 
pp = pp & ChrW(h) & Mid(tp(i+2), 3) 
i = i + 2 
Else 
pp = pp & Chr(a*2^8 Or b) & Mid(tp(i+1), 3) 
i = i + 1 
End If 
End If 
ElseIf isascii(a)=False Then 
pp = pp & tp(i) 
Else 
pp = pp & Chr(a) & Mid(tp(i), 3) 
End If 
End If 
Next 
URLDecode = pp 
End Function 

URLEncodeUTF8只写了多字节的加密，没有写ascii字节的，其实也没必要写这个，有个Server.URLEncode可以用，改成js版本的倒还有用武之地
js的版本,里面有个现成的函数
<script language=javascript>
alert(encodeURI("圪圪 eglic "))
</script>
看上边有人说看不懂，我来解释下吧。梅子的第一个函数是把多字节unicode编码转成我们通常正常的编码，在JS中如果偷懒，decodeURI也可实现这个功能。不过，看到这个具体是怎么实现的，感觉好爽，回家研究去啦。

复制代码代码如下:

 
<script language=javascript> 
function revertUTF8(szInput) 
{ 
var x,wch,wch1,wch2,uch="",szRet=""; 
for (x=0; x<szInput.length; x++) 
{ 
if (szInput.charAt(x)=="%") 
{ 
wch =parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
if (!wch) {break;} 
if (!(wch & 0x80)) 
{ 
wch = wch; 
} 
else if (!(wch & 0x20)) 
{ 
x++; 
wch1 = parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
wch = (wch & 0x1F)<< 6; 
wch1 = wch1 & 0x3F; 
wch = wch + wch1; 
} 
else 
{ 
x++; 
wch1 = parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
x++; 
wch2 = parseInt(szInput.charAt(++x) + szInput.charAt(++x),16); 
wch = (wch & 0x0F)<< 12; 
wch1 = (wch1 & 0x3F)<< 6; 
wch2 = (wch2 & 0x3F); 
wch = wch + wch1 + wch2; 
} 
szRet += String.fromCharCode(wch); 
} 
else 
{ 
szRet += szInput.charAt(x); 
} 
} 
return(szRet); 
} 
alert(revertUTF8("%E5%9C%AA%E5%9C%AA%20eglic%20 ")) 
alert(decodeURI("%E5%9C%AA%E5%9C%AA%20eglic%20 ")) 
</script> 

关于静态页生成问题突破form数量限制 utf-8编码转换成gb2312

ASP 中的 UTF-8编码

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